期刊
NANOTECHNOLOGY
卷 27, 期 38, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/27/38/385205
关键词
nano-mushroom; surface plasmon resonance; localized surface plasmon resonance; surface-enhanced Raman spectroscopy; FDTD simulation
Cost-effective, sensitive and bio- compatible surface-enhanced Raman spectroscopy (SERS) substrate has been in high demand since the Raman spectrum was designated as a significant tool for analyzing the composition of liquids, gases and solids in 1998 [1]. In this research, we presented the design, fabrication and characterization of an improved gold-based SERS substrate. With fine tuning of the SiO2 thickness we achieved a 3.391 times improvement and achieved an enhancement factor of 1.55 * 10(7) which is 15 times better than the current gold-standard Klarite substrate. Such improvement is ascribed to the localized surface plasmon resonance (SPR) and propagating SPR, which is proved by full-wave. finite-difference time-domain simulations.
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